//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005-2014 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// DESCRIPTION:  none
//

#ifndef __HULIB__
#define __HULIB__

// We are referring to patches.
#include "r_defs.h"

// font stuff
#define HU_CHARERASE    KEY_BACKSPACE

#define HU_MAXLINES     4
#define HU_MAXLINELENGTH    80

//
// Typedefs of widgets
//

// Text Line widget
//  (parent of Scrolling Text and Input Text widgets)
typedef struct
{
    // left-justified position of scrolling text window
    int     x;
    int     y;

    patch_t**   f;          // font
    int     sc;         // start character
    char    l[HU_MAXLINELENGTH+1];  // line of text
    int     len;                // current line length

    // whether this line needs to be udpated
    int     needsupdate;

} hu_textline_t;



// Scrolling Text window widget
//  (child of Text Line widget)
typedef struct
{
    hu_textline_t   l[HU_MAXLINES]; // text lines to draw
    int         h;      // height in lines
    int         cl;     // current line number

    // pointer to boolean stating whether to update window
    boolean*        on;
    boolean     laston;     // last value of *->on.

} hu_stext_t;



// Input Text Line widget
//  (child of Text Line widget)
typedef struct
{
    hu_textline_t   l;      // text line to input on

     // left margin past which I am not to delete characters
    int         lm;

    // pointer to boolean stating whether to update window
    boolean*        on;
    boolean     laston; // last value of *->on;

} hu_itext_t;


//
// Widget creation, access, and update routines
//

// initializes heads-up widget library
void HUlib_init(void);

//
// textline code
//

// clear a line of text
void    HUlib_clearTextLine(hu_textline_t *t);

void    HUlib_initTextLine(hu_textline_t *t, int x, int y, patch_t **f, int sc);

// returns success
boolean HUlib_addCharToTextLine(hu_textline_t *t, char ch);

// returns success
boolean HUlib_delCharFromTextLine(hu_textline_t *t);

// draws tline
void    HUlib_drawTextLine(hu_textline_t *l, boolean drawcursor);

// erases text line
void    HUlib_eraseTextLine(hu_textline_t *l);


//
// Scrolling Text window widget routines
//

// ?
void
HUlib_initSText
( hu_stext_t*   s,
  int       x,
  int       y,
  int       h,
  patch_t** font,
  int       startchar,
  boolean*  on );

// add a new line
void HUlib_addLineToSText(hu_stext_t* s);

// ?
void
HUlib_addMessageToSText
( hu_stext_t*   s,
  char*     prefix,
  char*     msg );

// draws stext
void HUlib_drawSText(hu_stext_t* s);

// erases all stext lines
void HUlib_eraseSText(hu_stext_t* s);

// Input Text Line widget routines
void
HUlib_initIText
( hu_itext_t*   it,
  int       x,
  int       y,
  patch_t** font,
  int       startchar,
  boolean*  on );

// enforces left margin
void HUlib_delCharFromIText(hu_itext_t* it);

// enforces left margin
void HUlib_eraseLineFromIText(hu_itext_t* it);

// resets line and left margin
void HUlib_resetIText(hu_itext_t* it);

// left of left-margin
void
HUlib_addPrefixToIText
( hu_itext_t*   it,
  char*     str );

// whether eaten
boolean
HUlib_keyInIText
( hu_itext_t*   it,
  unsigned char ch );

void HUlib_drawIText(hu_itext_t* it);

// erases all itext lines
void HUlib_eraseIText(hu_itext_t* it);

#endif
